Process for producing polyethylenes

Details Process for producing polyethylenes Process for producing polyethylenes

1989-10-11

1992-01-07

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526129, 526151, 526156, 526186, 502132, 502238, 502256, 502320, C08F 424, C08F 452

Patent

active

050793179

ABSTRACT:
A process for producing polyethylene is disclosed in which ethylene is polymerized in the presence of a composite catalyst. The catalyst is made up of a solid catalyst component typified by a selected chromium compound, a modified aluminum compound typified by a trialkylaluminum and an R.sub.n.sup.1 Al(OR.sup.2).sub.3-n compound wherein R.sup.1 and R.sup.2 are represented by selected hydrocarbon groups and n by 0.ltoreq.n.ltoreq.3. The polymer has improved melt index, flow parameter and melt tension characteristics.

REFERENCES:
patent: 4189402 (1980-02-01), Rekers et al.

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